All the science in the last few years, or almost all of it, really serves to show that the [climate] effects are larger and more rapid than we had thought even a decade ago.

Climate change is the single biggest thing that humans have ever done on this planet. The one thing that needs to be bigger is our movement to stop it.

The technology we need most badly is the technology of community, the knowledge about how to cooperate to get things done.

Very few people on earth ever get to say: 'I am doing, right now, the most important thing I could possibly be doing.' If you'll join this fight that's what you'll get to say

what you do every day is what forms your mind and precious few of us can or would spend most days outdoors.

In 50 years, no one will care about the fiscal cliff or the Euro crisis. They'll just ask, "So the Arctic melted, and then what did you do?"

Global warming is no longer a philosophical threat, no longer a future threat, no longer a threat at all. It's our reality.

Advent: the time to listen for footsteps - you can't hear footsteps when you're running yourself.

We've been given a warning by science, and a wake-up call by nature; it is up to us now to heed them.

The real negotiation is between humans on the one hand and chemistry and physics on the other. And chemistry and physics, unfortunately, don't bargain.

We can either save the planet from catastrophic warming, or protect fossil fuel CEOs. Not both. Do the math(s)

A man to whom a woman cannot look up, she cannot love. Yet, it is marvelous how a woman contrives to find something to look up to in a man.

All men commend patience, although few are willing to practice it.

There were in life rarely, if ever, "right" decisions, never perfect ones, only the best to be made under the circumstances.

Necessity is the constant scourge of the lower classes, ennui of the higher ones.

Nothing can stand in the way of the power of millions of voices calling for change.

That's, of course, the beautiful thing about science - that it's all about things we don't understand, not just the things we do understand.

When we let go of all our notions about things, everything becomes really true.

I don't think the subject of a documentary film should be producers on it.

That was a f****g dumb question. If I didn't think I was gonna win, why the hell would I be fighting?!

In fact, I think for a lot of writers, it's so hard to be read.